Letter opener



FIG. 1 is a perspective view of a letter opener showing our new design;

FIG. 2 is a front view thereof, the rear being identical;

FIG. 3 is a side view thereof, the opposing side being identical;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is an enlarged cross-section view thereof taken along line 6-6 indicated in FIG. 2.

The broken lines shown in the drawings are included for purposes of illustrating portions of the letter opener that form no part of the claimed design. 

CLAIM The ornamental design for a letter opener, as shown and described. 